Slash Magnatone Amp

Robert

Robert

Reverse Engineer
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I fixed a recent Magnatone for a friend not so long ago. An EL84 had shorted, taking out the cathode resistor and cap. To see how they were built and have to replicate it for the fix was really interesting, but I'm glad I'm not one of those having to make them! From a service and probably from a build POV there are far easier ways to construct an amp than PTP, especially when the amp gets more complex.

Do we know if the Slash model is PTP or turret board? In something like a guitar amp I can't really see any advantage to PTP. The only thing it does is drive the price up. My friend's amp sounded very good but no better than any of the Fender, Marshall or Vox style amps we can build these days. A Clark tweed repro will hold up against the Magnatone I tried and will probably be easier to service. And less $$ to buy!
 
HamishR said:
I fixed a recent Magnatone for a friend not so long ago. An EL84 had shorted, taking out the cathode resistor and cap. To see how they were built and have to replicate it for the fix was really interesting, but I'm glad I'm not one of those having to make them! From a service and probably from a build POV there are far easier ways to construct an amp than PTP, especially when the amp gets more complex.

Do we know if the Slash model is PTP or turret board? In something like a guitar amp I can't really see any advantage to PTP. The only thing it does is drive the price up. My friend's amp sounded very good but no better than any of the Fender, Marshall or Vox style amps we can build these days. A Clark tweed repro will hold up against the Magnatone I tried and will probably be easier to service. And less $$ to buy!
Click to expand...
Are we talking point to point with no circuit board? I literally loathe those..... tag strips everywhere, ugh.....

Was this a vintage Magnatone?
 
dawson said:
Has Marshall been out-Marshalled?? :oops:
Click to expand...
Marshall isn't an amp company any more though. It's a brand.
Soon we'll be getting half-track and full-stacks of Marshall branded pancakes at IHOP.
What's with all my food anaolgies tonight? Probably because everything in my midnight stop for the night, Bardstown, KY, closed at 10pm...
I'm fing hungry and it's gas station salad and turkey wrap night. Still haven't brought myself to take a bite...

With this much bourbon around, you'd think they'd have a Waffle House!
 
RetiredUnit1 said:
Are we talking point to point with no circuit board? I literally loathe those..... tag strips everywhere, ugh.....

Was this a vintage Magnatone?
Click to expand...
Real PTP, no circuit board, just the odd terminal strip. A real spider web. And this was in a recent Magnatone.

It took me a while to spot what had happened because when the bypass cap exploded it threw the ends of the cap away from each other so it wasn't obvious that a cap had been there at all. The guy who owned the amp said that it had sounded bad and just kept getting worse as he played and then it went BANG. I suggested that maybe as it got worse and worse maybe he should have stopped playing and he said that had occurred to him... What alerted me to the cap having once existed was the fluffy stuff and the smell. As it was a cathode biased EL84 amp I looked at a vintage Vox AC15 schematic (Magnatone wouldn't respond) and found that the power section was pretty similar so that helped me find my way around. The part values were readable on the deceased bits.

On a tag or turret board diagnosing the problem would probably have taken less time.
 
The Twilighter is an incredible amp…I woulda went with that one, but then, I don’t play counterfeit Gibson’s…
 
HamishR said:
Real PTP, no circuit board, just the odd terminal strip. A real spider web. And this was in a recent Magnatone.

It took me a while to spot what had happened because when the bypass cap exploded it threw the ends of the cap away from each other so it wasn't obvious that a cap had been there at all. The guy who owned the amp said that it had sounded bad and just kept getting worse as he played and then it went BANG. I suggested that maybe as it got worse and worse maybe he should have stopped playing and he said that had occurred to him... What alerted me to the cap having once existed was the fluffy stuff and the smell. As it was a cathode biased EL84 amp I looked at a vintage Vox AC15 schematic (Magnatone wouldn't respond) and found that the power section was pretty similar so that helped me find my way around. The part values were readable on the deceased bits.

On a tag or turret board diagnosing the problem would probably have taken less time.
Click to expand...
At least it would have charred the circuit board, giving a clue as to where to look!!!!
 
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